The above question is wrongly phrased; because it implies that blasphemy laws are optional; whereas there Always Are blasphemy laws - and the only aspect that varies, are what 'religion' those blasphemy laws defend.
There used to be Christianity-defending blasphemy laws; but now there are Leftism-defending blasphemy laws (plus blasphemy laws defending some other, Not-Christian religions).
But when there are laws, there will be de facto blasphemy laws.
Of course, ideally there are no laws - in Heaven there are no laws. But when we must have laws... well, some of them will be defending the moral system of that society; including when that morality is strategically evil, as now.